Handle new files presence in Create-Pull-Request.ps1 (#660)
Handle new files presence in Create-Pull-Request.ps1 (#660)

* extend the template to also include NEW files during rebase and patch application

* handle LASTEXITCODE after git add
tg-msft/azure-sdk-tools,tg-msft/azure-sdk-tools,tg-msft/azure-sdk-tools,tg-msft/azure-sdk-tools,tg-msft/azure-sdk-tools,tg-msft/azure-sdk-tools,tg-msft/azure-sdk-tools,tg-msft/azure-sdk-tools